/* msg_prc_lt_ctrl.c
 * WiMax MAC Management PRC-LT-CTRL Message decoders
 *
 * Copyright (c) 2007 by Intel Corporation.
 *
 * Author: John R. Underwood <junderx@yahoo.com>
 *
 * $Id: msg_prc_lt_ctrl.c 23661 2007-11-28 23:22:38Z gerald $
 *
 * Wireshark - Network traffic analyzer
 * By Gerald Combs <gerald@wireshark.org>
 * Copyright 1999 Gerald Combs
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

/* Include files */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "moduleinfo.h"

#include <glib.h>
#include <epan/packet.h>
#include <epan/prefs.h>
#include "crc.h"
#include "wimax_tlv.h"
#include "wimax_mac.h"

extern gint man_ofdma;

/* Forward reference */
void dissect_mac_mgmt_msg_prc_lt_ctrl_decoder(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);

static gint proto_mac_mgmt_msg_prc_lt_ctrl_decoder = -1;

static gint ett_mac_mgmt_msg_prc_lt_ctrl_decoder = -1;

/* Setup protocol subtree array */
static gint *ett[] =
{
	&ett_mac_mgmt_msg_prc_lt_ctrl_decoder,
};

/* PRC-LT-CTRL fields */
static gint hf_prc_lt_ctrl_message_type = -1;
static gint hf_prc_lt_ctrl_precoding = -1;
static gint hf_prc_lt_ctrl_precoding_delay = -1;
static gint hf_prc_lt_ctrl_invalid_tlv = -1;

static const value_string vals_turn_on[] = {
    {0,					"Turn off"},
    {1,					"Turn on"},
    {0,					NULL}
};

/* PRC-LT-CTRL fields display */
static hf_register_info hf[] =
{
	{
		&hf_prc_lt_ctrl_message_type,
		{
			"MAC Management Message Type", "wmx.macmgtmsgtype.prc_lt_ctrl",
			FT_UINT8, BASE_DEC, NULL, 0x0, "", HFILL
		}
	},
	{
		&hf_prc_lt_ctrl_invalid_tlv,
		{
			"Invalid TLV", "wmx.prc_lt_ctrl.invalid_tlv",
			FT_BYTES, BASE_HEX, NULL, 0, "", HFILL
		}
	},
	{
		&hf_prc_lt_ctrl_precoding,
		{
			"Setup/Tear-down long-term precoding with feedback",
			"wimax.prc_lt_ctrl.precoding",
			FT_UINT8, BASE_DEC, VALS(&vals_turn_on), 0x80, "", HFILL
		}
	},
	{
		&hf_prc_lt_ctrl_precoding_delay,
		{
			"BS precoding application delay",
			"wimax.prc_lt_ctrl.precoding_delay",
			FT_UINT8, BASE_DEC, NULL, 0x60, "", HFILL
		}
	}
};


/* Register Wimax Mac Payload Protocol and Dissector */
void proto_register_mac_mgmt_msg_prc_lt_ctrl(void)
{
	if (proto_mac_mgmt_msg_prc_lt_ctrl_decoder == -1) {
		proto_mac_mgmt_msg_prc_lt_ctrl_decoder = proto_register_protocol (
							"WiMax PRC-LT-CTRL Message", /* name */
							"WiMax PRC-LT-CTRL (prc)", /* short name */
							"wmx.prc" /* abbrev */
							);

		proto_register_field_array(proto_mac_mgmt_msg_prc_lt_ctrl_decoder, hf, array_length(hf));
		proto_register_subtree_array(ett, array_length(ett));
	}
}

/* Decode PRC-LT-CTRL messages. */
void dissect_mac_mgmt_msg_prc_lt_ctrl_decoder(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree)
{
	guint offset = 0;
	guint tvb_len, payload_type;
	proto_item *prc_lt_ctrl_item = NULL;
	proto_tree *prc_lt_ctrl_tree = NULL;

	/* Ensure the right payload type */
	payload_type = tvb_get_guint8(tvb, 0);
	if(payload_type != MAC_MGMT_MSG_PRC_LT_CTRL)
	{
		return;
	}

	if (tree)
	{	/* we are being asked for details */

		/* Get the tvb reported length */
		tvb_len =  tvb_reported_length(tvb);
		/* display MAC payload type PRC-LT-CTRL */
		prc_lt_ctrl_item = proto_tree_add_protocol_format(tree, proto_mac_mgmt_msg_prc_lt_ctrl_decoder, tvb, 0, tvb_len, "MAC Management Message, PRC-LT-CTRL (65)");

		/* add MAC PRC-LT-CTRL subtree */
		prc_lt_ctrl_tree = proto_item_add_subtree(prc_lt_ctrl_item, ett_mac_mgmt_msg_prc_lt_ctrl_decoder);

		/* display the Message Type */
		proto_tree_add_item(prc_lt_ctrl_tree, hf_prc_lt_ctrl_message_type, tvb, offset, 1, FALSE);
		offset ++;

		/* display whether to Setup or Tear-down the
		 * long-term MIMO precoding delay */
		proto_tree_add_item(prc_lt_ctrl_tree, hf_prc_lt_ctrl_precoding, tvb, offset, 1, FALSE);

		/* display the Precoding Delay */
		proto_tree_add_item(prc_lt_ctrl_tree, hf_prc_lt_ctrl_precoding_delay, tvb, offset, 1, FALSE);
	}
}